The Camco Universal-LED Bulb produces 200 lumens of bright white light while only using 2.4 watt's of energy. With this bulb you can save energy and stop wasting time changing light bulbs all the time. These LEDs will last up to 60,000 hours of use. The Universal bulb replaces any bulb with a BA15s, BA15d, G4, W2.1 x 9.5d, and SV8.5-8. The package comes with five different bases with a male locking adapter for connection to the LED. (1) BA15s single bayonet, (1) BA15d double bayonet, (1) bi-pin G4, (1) wedge and (1) festoon base. These bulbs are built to withstand the power fluctuations which can occur in boats and RVs.